Plow frame



FIG. 1 is a front side perspective view of a plow frame showing my new design, the broken line disclosure of the plow bottoms are for illustrative purposes only;

FIG. 2 is a rear, side perspective view thereof;

FIG. 3 is a front perspective view thereof;

FIG. 4 is a rear, side perspective view taken from the side opposite that shown in FIG. 2. 

The ornamental design for a plow frame, as shown and described. 